﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections.Specialized;
using System.Text.RegularExpressions;


namespace ASPermissions
{
    /// <summary>

    /// Arguments class
    /// Source Code provided by http://www.codeproject.com/KB/recipes/command_line.aspx
    /// Author: Richard Lopes
    /// Adapted by: Rodrigo Souza 
    /// Copyright (c) <2011> <copyright holders>
    ///Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
    ///The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
    ///THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


    /// </summary>

    public class Arguments{
        // Variables

        private StringDictionary Parameters;

        // Constructor

        public Arguments(string[] Args)
        {
            Parameters = new StringDictionary();
            Regex Spliter = new Regex(@"^/|=|:", RegexOptions.IgnoreCase | RegexOptions.Compiled); //Regex(@"^-{1,2}|^/|=|:", RegexOptions.IgnoreCase|RegexOptions.Compiled); - Original code

            Regex Remover = new Regex(@"^['""]?(.*?)['""]?$", RegexOptions.IgnoreCase|RegexOptions.Compiled);

            string Parameter = null;
            string[] Parts;

            // Valid parameters forms:

            // {-,/,--}param{ ,=,:}((",')value(",'))

            // Examples: 

            // -param1 value1 --param2 /param3:"Test-:-work" 

            //   /param4=happy -param5 '--=nice=--'

            foreach(string Txt in Args)
            {
                // Look for new parameters (-,/ or --) and a

                // possible enclosed value (=,:)

                Parts = Spliter.Split(Txt,3);

                switch(Parts.Length){
                // Found a value (for the last parameter 

                // found (space separator))

                case 1:
                    if(Parameter != null)
                    {
                        if(!Parameters.ContainsKey(Parameter)) 
                        {
                            Parts[0] = Remover.Replace(Parts[0], "$1");

                            Parameters.Add(Parameter, Parts[0]);
                        }
                        Parameter=null;
                    }
                    // else Error: no parameter waiting for a value (skipped)

                    break;

                // Found just a parameter

                case 2:
                    // The last parameter is still waiting. 

                    // With no value, set it to true.

                    if(Parameter!=null)
                    {
                        if(!Parameters.ContainsKey(Parameter)) 
                            Parameters.Add(Parameter, "true");
                    }
                    Parameter=Parts[1];
                    break;

                // Parameter with enclosed value

                case 3:
                    // The last parameter is still waiting. 

                    // With no value, set it to true.

                    if(Parameter != null)
                    {
                        if(!Parameters.ContainsKey(Parameter)) 
                            Parameters.Add(Parameter, "true");
                    }

                    Parameter = Parts[1];

                    // Remove possible enclosing characters (",')

                    if(!Parameters.ContainsKey(Parameter))
                    {
                        Parts[2] = Remover.Replace(Parts[2], "$1");
                        Parameters.Add(Parameter, Parts[2]);
                    }

                    Parameter=null;
                    break;
                }
            }
            // In case a parameter is still waiting

            if(Parameter != null)
            {
                if(!Parameters.ContainsKey(Parameter)) 
                    Parameters.Add(Parameter, "true");
            }
        }

        // Retrieve a parameter value if it exists 

        // (overriding C# indexer property)

        public string this [string Param]
        {
            get
            {
                return(Parameters[Param]);
            }
        }
    }
}
